One thing I have learned, you need a line in the sand. If I can't make money with $1,000, then I surely can't with $30,000, so the money is not my problem if not making it. I have learned to concentrate on one stock first and no others. One needs cash to "average down" fast if made wrong entry position. This allows you to get out of trouble instead of staying "all in" all of the time. Then you see opportunities you miss, because , when they dip, you cannot buy any shares cheaper and then have dead money for a long while waiting, or sell at a loss. Gotta hold clear cash in reserve in trading acct to get out of mistakes before they become losses or investments
Good luck, but this is what I have learned